cc: Make BackToBackBeginFrameSource a SyntheticBeginFrameSource.

cc/test/scheduler_test_common.h

Index: cc/test/scheduler_test_common.h
diff --git a/cc/test/scheduler_test_common.h b/cc/test/scheduler_test_common.h
index f3c6f9c3d8af422e19e2ea9fbe616c214b23f250..df0d522a7a7c80dbe16d1a7a82e30a33e699b8e7 100644
--- a/cc/test/scheduler_test_common.h
+++ b/cc/test/scheduler_test_common.h
@@ -40,23 +40,14 @@ class FakeDelayBasedTimeSourceClient : public DelayBasedTimeSourceClient {
 
 class FakeDelayBasedTimeSource : public DelayBasedTimeSource {
  public:
-  static std::unique_ptr<FakeDelayBasedTimeSource> Create(
-      base::TimeDelta interval,
-      base::SingleThreadTaskRunner* task_runner) {
-    return base::WrapUnique(
-        new FakeDelayBasedTimeSource(interval, task_runner));
-  }
-
+  explicit FakeDelayBasedTimeSource(base::SingleThreadTaskRunner* task_runner)
+      : DelayBasedTimeSource(task_runner) {}
   ~FakeDelayBasedTimeSource() override {}
 
   void SetNow(base::TimeTicks time) { now_ = time; }
   base::TimeTicks Now() const override;
 
  protected:
-  FakeDelayBasedTimeSource(base::TimeDelta interval,
-                           base::SingleThreadTaskRunner* task_runner)
-      : DelayBasedTimeSource(interval, task_runner) {}
-
   base::TimeTicks now_;
 
  private:
@@ -65,21 +56,11 @@ class FakeDelayBasedTimeSource : public DelayBasedTimeSource {
 
 class TestDelayBasedTimeSource : public DelayBasedTimeSource {
  public:
-  static std::unique_ptr<TestDelayBasedTimeSource> Create(
-      base::SimpleTestTickClock* now_src,
-      base::TimeDelta interval,
-      OrderedSimpleTaskRunner* task_runner) {
-    return base::WrapUnique(
-        new TestDelayBasedTimeSource(now_src, interval, task_runner));
-  }
-
-  ~TestDelayBasedTimeSource() override;
-
- protected:
   TestDelayBasedTimeSource(base::SimpleTestTickClock* now_src,
-                           base::TimeDelta interval,
                            OrderedSimpleTaskRunner* task_runner);
+  ~TestDelayBasedTimeSource() override;
 
+ protected:
   // Overridden from DelayBasedTimeSource
   base::TimeTicks Now() const override;
   std::string TypeString() const override;
@@ -115,32 +96,6 @@ class FakeBeginFrameSource : public BeginFrameSourceBase {
   DISALLOW_COPY_AND_ASSIGN(FakeBeginFrameSource);
 };
 
-class TestBackToBackBeginFrameSource : public BackToBackBeginFrameSource {
- public:
-  TestBackToBackBeginFrameSource(base::SimpleTestTickClock* now_src,
-                                 base::SingleThreadTaskRunner* task_runner);
-  ~TestBackToBackBeginFrameSource() override;
-
- protected:
-  base::TimeTicks Now() override;
-  // Not owned.
-  base::SimpleTestTickClock* now_src_;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(TestBackToBackBeginFrameSource);
-};
-
-class TestSyntheticBeginFrameSource : public SyntheticBeginFrameSource {
- public:
-  explicit TestSyntheticBeginFrameSource(base::SimpleTestTickClock* now_src,
-                                         OrderedSimpleTaskRunner* task_runner,
-                                         base::TimeDelta initial_interval);
-  ~TestSyntheticBeginFrameSource() override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(TestSyntheticBeginFrameSource);
-};
-
 class FakeCompositorTimingHistory : public CompositorTimingHistory {
  public:
   static std::unique_ptr<FakeCompositorTimingHistory> Create(